In short: Hyoscyamus niger (henbane, Hyos.) is the passive member of the Solanaceae delirium trio: suspicion with fear of being poisoned, jealousy recorded as a cause of illness, shameless uncovering, a low muttering delirium with picking at the bedclothes, twitching of every muscle, and a dry cough worse lying down and better sitting up. Beside Belladonna and Stramonium it has the least fever, the least violence and the most weakness, with a pale face. In Kent's words, "Hyoscyamus has a passive mania."
This guide to the Hyoscyamus materia medica is for students and practitioners learning the Belladonna, Stramonium and Hyoscyamus trio. Boericke opens his entry with this: "Disturbs the nervous system profoundly. It is as if some diabolical force took possession of the brain and prevented its functions." Kent puts the weight in the same place: "The mental state is really the greatest part of Hyoscyamus." The symptom language below is the historical record of the materia medica, set out for professional assessment. The repertories abbreviate the remedy as Hyos., one of the shorthands explained in remedy abbreviations decoded.
Look up the Hyoscyamus mind symptoms in Kent's Repertory, free. Kent's Repertory lists Hyoscyamus in 2,177 rubrics, 451 of them in the Mind chapter. Type jealousy, suspicion, shamelessness, muttering delirium or picking at the bedclothes in plain language and AI semantic repertory search finds Kent's own wording, free on every Similia plan with the seven other classical repertories. Open Kent's Repertory →
This profile of homeopathic Hyoscyamus draws on Boericke, Kent's Lectures, Clarke, Nash, Farrington, H.C. Allen, Lippe, Boger, Guernsey, Hering and Hahnemann's Materia Medica Pura. Read the originals in full, starting with Boericke's Hyoscyamus, Clarke's Hyoscyamus and Kent's Hyoscyamus. It is written for practitioners and students, not as self-treatment advice.
The Hyoscyamus State
The first thing to grasp is excitement without inflammation. Boericke writes "Non-inflammatory cerebral activity", and H.C. Allen "increased cerebral activity, but non-inflammatory in type". Farrington, setting the three Solanaceae side by side, gives Hyoscyamus "more nervous irritation with less congestion and inflammation than either of the others."
Weakness shapes everything else. Nash: "The Hyoscyamus patient is weak and the weakness increases. His violent outbreaks of delirium cannot keep up long on account of weakness." Farrington calls it "a more adynamic remedy than Belladonna", and Kent sums it up as "excitability and gradually increasing weakness."
Allen's constitutional type is "Persons of sanguine temperament; who are irritable, nervous, hysterical", and Clarke adds light-haired people and notes that Hyoscyamus, "like the other Solanids, is a chilly remedy". The face is the quickest outward sign: pale or bluish for Clarke, "pale and sunken" for Nash.
The plant and the poisonings
Clarke describes henbane, the "Hog-bean", growing "on old rubbish heaps, near ruins, on roadsides", hairy and sticky where Belladonna is smooth, with a flower of "a dirty yellow, with claret-coloured streaks". The remedy is a tincture of the fresh plant. Clarke then quotes two reports that, he says, "cover a large share of the ground occupied by Hyo." In a report to the Times (14 May 1892), F. Mackarness described being poisoned by henbane seed put into soup in place of celery seed: dizziness, food that tasted "nothing but dust and ashes", blurred sight, a parched mouth and throat, drowsiness, indistinct speech and dilated pupils. Dr W. S. Mills reported in 1899 that, after tasting water into which the tincture had been mixed, he felt "as though I walked through and on air", fighting an urge to laugh and shout, a state he likened to "mild hilarious intoxication".
Mental and Emotional Picture
Suspicion and the fear of poison
Boericke's mind section begins "Very suspicious", and his opening adds "Is jealous, afraid of being poisoned". Kent makes suspicion the thread through every phase: "Suspicion runs through acute sickness; it runs through the mania in insanity. Suspicion that his wife is going to poison him; that his wife is untrue to him." The practical consequence follows: "Refuses to take medicine because it is poisoned." Clarke records "Fear of being betrayed or poisoned" and calls suspicion "one great characteristic". Allen's fears point the same way: of being alone, of poison, of being bitten or sold, of eating, drinking or taking what is offered, with the suspicion of some plot.
Hyoscyamus jealousy as a cause
Hahnemann's proving lists "Jealousy." as a symptom in its own right, and Clarke's Causation line opens with the same word. Lippe lists the bad effects of jealousy and calls it "a mental modality". Allen records the bad effects of unfortunate love with jealousy, rage and incoherent speech, and Hering has "Erotic mania accompanied by jealousy". Kent says the mental states may come on "in a young woman from disappointed affections", and Farrington names jealousy and the effects of disappointed love among the forms the cerebral symptoms take, "particularly in women". In Hyoscyamus, jealousy works as a causation and a modality, not only as a state of mind.
Shamelessness and uncovering
Boericke: "Inclined to be unseemly and immodest in acts, gestures and expressions." Hahnemann's proving quotes Greding: "He lies naked in bed and chatters." Guernsey adds that fever patients throw off the bedclothes "not because they are too warm, but they will not remain covered". For study, the distinction Kent draws matters more than the detail: he reads it in two phases. One is an uncovering from hypersensitive skin: "He appears to be perfectly shameless, but he has no thought of shamelessness, no thought that he is doing anything unusual, but he does it from the hyperesthesia of the skin." The other is a true salacity, which he treats separately.
The muttering, busy delirium
Boericke's line is the core: "Low, muttering speech; constant carphologia, deep stupor." Hahnemann's proving quotes Costa: "Floccillation and murmuring at the same time." Kent calls it a busy delirium about the usual occupation, "Undertaking to do the usual things, the usual duties", with the patient talking to imaginary people or to the dead, and he adds that the patient "makes short, abrupt answers to imaginary questions." Boger has a small, telling detail: "Speaks each word louder."
The delirium breaks off into stupor. Lippe: "When spoken to, the answer is properly given, but immediately unconsciousness and delirium return." Kent and Clarke describe the same patient, roused to answer correctly and back in stupor the moment he finishes.
Foolish hilarity
The other face of the delirium is silliness. Boericke: "Great hilarity; inclined to laugh at everything." Hahnemann quotes Sauvages: "Foolish laughter." Boger has "silly, with comical acts; plays with fingers", and Mills called his own state a "funny drunk".
Light and company: the sources split
Aversion to light is consistent: Farrington gives the patient "a particular aversion to light", and Boger writes "Averse to light." Company is recorded both ways: under the old clinical heading of delirium tremens, Clarke, Lippe and Hering record aversion to light and company, while Allen, Kent and Boger record fear of being alone. Do not hang the Stramonium differential on company alone. Kent also records "Anxiety on hearing running water", a fear of water he gives Belladonna, Cantharis and Stramonium as well.
Twitching, Picking and Convulsions
Twitching is the motor signature. Nash quotes H. N. Guernsey: "Every muscle in the body twitches, from the eyes to the toes." Clarke: "Twitching is one of the grand characteristics of Hyo." Boericke: "Great restlessness; every muscle twitches", with subsultus tendinum.
The hands are never still. Boericke: "Picking at bed-clothes; plays with hands; reaches out for things." Kent's patient picks at the bedclothes, the nightshirt and his own fingers, "grasping as if he were grasping at flies". The movements are angular: Boger has "angular or clutching motions, CARPHOLOGY, subsultus", and Farrington is exact: "The abnormal movements accompanying these symptoms are rather angular; they are not at all of the gyratory character significant of the Stramonium."
The convulsions are recorded as historical observations. Kent lists "Convulsions of children, especially from fright. Convulsions after eating." Allen gives the sequence "after meals, child vomits, sudden shriek, then insensible", and records spasms without consciousness. Boericke has "Epileptic attacks ending in deep sleep", and Nash notes that the spasms are "generally of the clonic, not the tonic order".
Physical Affinities
The cough
Boericke: "Dry, spasmodic cough at night (worse lying down; better sitting up), from itching in the throat, as if uvula were too long." Farrington explains it: "The uvula hangs down and rests on the root of the tongue, causing irritation and the consequent cough." Clarke and Kent add aggravation after eating, drinking and talking, and Nash notes it especially in elderly people. Hahnemann's proving has it too: "Whilst lying almost incessant cough, which goes off on sitting up." Kent's Repertory carries Hyoscyamus in its highest grade in Cough; DRY; night; sitting up amel. and Cough; CONSTANT; lying; agg., sitting up amel. Clarke and Allen compare Drosera for a cough worse lying down.
Mouth, tongue and throat
In Kent the mouth is "as dry as burnt leather". Boericke: "Tongue dry, red, cracked, stiff and immovable, protruded with difficulty", with sordes on the teeth and "Lower jaw drops." Boericke also has "Cannot swallow liquids", and Kent writes that "The sight of water, or the hearing of running water, or the attempt to swallow water produces spasmodic constriction of the oesophagus."
Eyes, bowel and bladder
Boericke: "Pupils dilated, sparkling, fixed", with strabismus, diplopia and "Objects have colored borders." Clarke and Farrington record objects that look too large or red, and Kent adds "An object looked at jumps." In the abdomen Boericke records "Colic, as if abdomen would burst" and tympanites. Stool and urine pass involuntarily, painlessly in Kent's account, and Boericke adds "Has no will to urinate", comparing Causticum.
Sleep
Boericke: "Intense sleeplessness... Starts up frightened. Coma vigil." Kent: "Lying on the back he suddenly sits up and then lies down again." Farrington describes the same scene: "Lying quietly in the bed, he suddenly sits up and looks around as if looking for some one whom he expected to see in the room", then lies down and sleeps again. Boericke adds "Child sobs and cries without waking."
The Typhoid Picture in the Older Texts
Nineteenth-century authors used Hyoscyamus as a reference point in low continued fevers; read this as historical clinical record, not a modern indication. Nash: "The stupid muttering form predominates, with occasional outbreaks of the violent form." The tongue is dry and unwieldy, sordes form, the lower jaw drops, and stool and urine pass involuntarily, "the most complete picture of great prostration of mind and body." Boger adds that "he slides down in bed". Farrington sets the sequence: Belladonna fits the wild beginning, and "Hyoscyamus comes in later when the stupor becomes more marked". Kent's Repertory carries Hyoscyamus in its highest grade in Fever; CONTINUED fever, typhus; typhoid; stupor, complete.
Key Modalities
Worse from:
- Night and evening; lying down; during rest (Lippe)
- After eating and drinking
- Touch (Clarke, Boger)
- Cold and cold air (Clarke, Lippe, Guernsey); sleep (Boger)
- Emotions: fright, jealousy, unhappy love (Boger, Clarke, Allen, Lippe)
- Menses: before, at the start of and during (Clarke, Guernsey, Boericke)
Better from:
- Sitting up (Boger, Clarke, Lippe)
- Stooping (Boericke, Guernsey, Lippe)
- Motion, walking and warmth (Clarke)
Clarke's summary: "The majority of, and the principal symptoms, manifest themselves after eating or drinking, as well as in the evening."
Hyoscyamus Keynotes
- Suspicious; fears being poisoned; refuses medicine as poisoned
- Jealousy and unfortunate love as causes
- Will not remain covered; shameless uncovering
- Low, muttering delirium alternating with stupor
- Answers correctly, then sinks back at once
- Picks at the bedclothes; grasps at imaginary objects
- Every muscle twitches, from the eyes to the toes; subsultus tendinum
- Angular, clutching motions, not Stramonium's graceful ones
- Pale face and increasing weakness
- Foolish laughter; silly, comical acts
- Dry cough at night, worse lying, better sitting up; elongated uvula
- Tongue dry as burnt leather; lower jaw drops; cannot swallow liquids
- Involuntary stool and urine; no will to urinate
- Sits up suddenly in bed, looks around, then lies down again
Differential Diagnosis
Hyoscyamus, Stramonium and Belladonna
Nash calls these "the trio of delirium remedies". The table sets out where the authors separate them.
| Hyoscyamus | Stramonium | Belladonna | |
|---|---|---|---|
| Heat (Kent's order: Bell., Stram., Hyos.) | "a low fever, not very high, sometimes none at all" | "moderately hot in its fever, as a rule" | "very hot in its mental states" |
| Violence (Kent's order: Stram., Bell., Hyos.) | "a passive mania. Does not go into violence" | "most violent and active" | between the two |
| Brain (Farrington) | nervous irritation, least congestion | congestion with more sensorial excitement | most congestion or inflammation |
| Face | pale or bluish (Clarke); pale and sunken (Nash) | bright red, less congested than Belladonna (Farrington) | red, almost purple red (Nash) |
| Talk (Nash) | "the most insensibly stupid" | "the most widely loquacious" | half way between |
| In bed (Nash) | twitches, picks and reaches, "otherwise lying pretty still" | throws himself about, jerking his head from the pillow | starts or jumps on falling asleep or waking |
Boericke grades the trio from both sides: under Belladonna, "Hyos (less fever, more agitation); Stram (more sensorial excitement, frenzy)", and under Stramonium, "It has less fever than Bellad, but more than Hyos." Against Stramonium, three more signs help. Stramonium's movements are graceful and gyratory where those of Hyoscyamus are angular (Clarke's Stramonium entry: "Gyrating movements (Hyo., angular)"), it craves the light that Hyoscyamus avoids, and, in Clarke's words, "Stram. uncovers whole body, Hyo. especially the genitals". Against Belladonna, the course decides: the furious beginning with heat, a red face and throbbing carotids belongs to Belladonna, the later stupor to Hyoscyamus. Allen puts the trio in one sentence: Hyoscyamus "lacks the constant cerebral congestion of the former and the fierce rage and maniacal delirium of the latter."
Hyoscyamus vs Lachesis: when jealousy leads
Jealousy cannot separate these two, because both have it. Boericke cross-refers them under Lachesis with "Jealous (Hyos)". Both fear poison. Both talk: Farrington's Hyoscyamus patient jumps from one subject to another "pretty much as in Lachesis". Kent even gives both the same religious despair, a patient who cannot apply the promises in the Word of God to herself. Nor does the low fever picture settle it: Clarke calls the delirium of Lachesis "of the low, muttering type", and Allen gives it stupor or muttering delirium with a falling lower jaw. The Lachesis guide covers its side of the jealousy picture; the differential rests on the motor signs and the generals.
| Hyoscyamus | Lachesis | |
|---|---|---|
| Texture of the jealousy (Kent) | suspicion of poison and infidelity; "Erotic mania, accompanied by jealousy" | "Jealousy without any reason"; sure that a whispered conversation is about her |
| Fear of poison (Kent) | his wife is going to poison him; refuses medicine | her relatives are trying to poison her; refuses to eat |
| What points to each | twitching, angular picking at the bedclothes, shameless uncovering | "sleeps into aggravation"; "Cannot bear anything tight anywhere"; worse on the left side (Boericke) |
In low fevers Farrington writes that "Hyoscyamus is perhaps more similar to Lachesis than is Opium", and names the sign that marks Hyoscyamus: twitching of the muscles, "a necessary symptom of Hyoscyamus."
Other comparisons
Opium. Nash calls the low stupor of Hyoscyamus "equal to that of Opium" and admits it is sometimes difficult to choose between them. Farrington gives Opium unconsciousness, stertorous breathing and "a dark or brownish-red hue of the face"; Hyoscyamus shares the dropped jaw and the snoring breathing, but the patient is weak and trembling, with twitching of the muscles.
Nux vomica. Clarke finds every muscle twitching in both, "but Nux retains consciousness, Hyo. has unconsciousness".
Apis and Ignatia. Clarke's compare line for jealousy names "Apis, Ign."; their own jealousy pictures are in those guides.
Relationships
Boericke compares Belladonna, Stramonium, Agaricus and Gelsemium, and Boger lists Belladonna, Phosphorus and Stramonium as related. Clarke records Hyoscyamus as followed well by Belladonna, Pulsatilla, Stramonium, Veratrum and Phosphorus, and as following Belladonna, Nux vomica, Opium and Rhus well.
Farrington adds a caution: a case clearly made out for Hyoscyamus "does not always act", and he then looks up Lachesis, Lycopodium, Muriatic acid and Arsenicum. Treat this as a study framework, not a prescribing sequence.
Repertorisation Tips
In Kent's Repertory, Hyoscyamus is most often found in the Mind chapter (451 rubrics), then Generalities (237), Extremities (212), Head (152) and Skin (88). For contrast, Stramonium appears in 2,473 Kent rubrics (Mind 590) and Belladonna in 5,299 (Mind 655). Mind is the largest chapter for all three, so grading and the accompanying signs separate them, not delirium itself.
Among the rubrics where Kent gives Hyoscyamus his highest grade:
- Mind; SHAMELESS; exposes the person
- Mind; SPEECH, babbling; prattling; lies naked in bed
- Mind; ANSWERS; stupor returns quickly after
- Mind; RAGE, fury; violent
- Mind; GESTURES, makes; intoxicated, as if
- Cough; DRY; night; sitting up amel.
- Cough; CONSTANT; lying; agg., sitting up amel.
- Throat; CHOKING, constricting; swallowing, on; liquids
- Stomach; HICCOUGH; convulsions, with
- Fever; CONTINUED fever, typhus; typhoid; stupor, complete
The rage rubric does not contradict Kent's passive mania. Clarke gives Hyoscyamus "fits of ungovernable rage, but the violence is not so sustained as that of Bell."
For jealousy, suspicion, muttering delirium and picking at the bedclothes, search the phrase in plain language in Kent's Repertory and let semantic search return Kent's own wording and grades. Anchor on the mental picture and the low, muttering delirium, confirm with the motor signs and the cough modality, and re-read Lachesis if the case carries its generals. The beginner's guide to repertorisation sets out the method, and the Kent's Repertory guide explains its chapters and grades.
Reading the Hyoscyamus Materia Medica
The Hyoscyamus niger materia medica runs through 16 of the 21 classic books on Similia, all free to read in Similia's free digital materia medica. These carry most of the picture:
- Boericke compresses the picture and the modalities into one page (Boericke's entry)
- Kent's Lectures hold the mental picture, the trio grading and the explanation of uncovering (James Tyler Kent)
- Clarke's Dictionary has the botany, the poisoning reports and the fullest Relations (John Henry Clarke)
- Nash and Farrington give the bedside and systematic comparisons of the trio (Nash's entry, Farrington's lecture); H.C. Allen distils the keynotes (Allen's entry)
- Hahnemann's Materia Medica Pura, volume IV, second edition (1825), holds the proving: 582 symptoms, with Flaming, Franz, Fr. Hahnemann, Langhammer, Stapf and Wislicenus assisting (Hahnemann's entry; see the Materia Medica Pura guide)
- Hering's Guiding Symptoms adds the clinical confirmations with a list of their authorities, and its mind section includes "Jealousy: with rage and delirium" (Hering's entry)
Searching inside the materia medica requires paid access. The eight classical repertories with AI semantic repertory search are free on every plan; Pro adds the AI toolkit (Notes-to-Rubric, AI case analysis, live audio transcription and photo analysis), which uses credits. To place Hyoscyamus among its peers, see the essential polycrest remedies, and read how materia medica and repertory work together in case analysis.
